Condenser.



110. 863,115. PATBNTED 111111.13, 1907.

R. D. TUMLINSON.

GONDENSER.

APPLICATION FILED NOV. 1, 1904.

sr. DVI..

WIITNES'SES.- ROY/1L. D. TOMLl/V'O/V /NI/ENTo/e @fifi/5.7. By //MwxATTORNEY.

UNITED sTATEs PATENT oEEreE.

.ROYAL D. ToMLINsoN, or NEW YORK, NY., AssIerNoR To ALLIs-GHALMERSCOMPANY, oF

MILWAUKEE, WISGDNSIN,VA CORPORATION OF NEW JERSEY.

' coNnENsEn.

Specilcation of Letters Patent.'

Patented Aug. 13, 1907.

.Appliloateniiledllovemher1,1904.- Serial No. 231,002. l f' LvToallrwhomlit rrioyfconcern: d

Beit known that I, ROYAL D. ToMLINsoN, a citizen of the United States,residing at New York, in the ucounty of New York and State of New York,have indenser of water and air in,either the surface or the jet pumpinto the wet-air pump between` the plunger valves and the dischargevalves.

Another object of the invention is to provide a water packing for thedryair pump trunk-piston.

Another object is to aerate the water from the confA denser for use asfeed water. l

Another object is to provide small vclearance `in the wet-air pump bycutting off `the induction port bythe plunger before completion of thestroke.Y f

Another object is to deliver substantially all thel air.

from the dry-air pump before water enters the wetfair pump on deliveryside of the plunger. The invention is best disclosed by reference to theaccompanying drawing forming-a part of the specication and in Which,-

The single figure is an .elevation partly in section showing thecondenser system. Y

The condenser 1 is either of the surface or the jet type, and isconventionally shown, as the details thereof form no part of myinvention. An air pipe 2 leads from the upper portion of the condenserand serves to remove the air which comes to the condenser in the steam.A pipe 3 leads from the lower portion of the condenser and serves toremove the water from tli condenser.

A dry-air pump 4 and a wet-air pump 5 are mounted, respectively,partially between the members of a pair of pedestals 6 bolted to abase-plate 7. Between the two pairs oi pedestals a steam engine 8 ismounted. The' steam engine drives a main shaft at the top ofthepedestals and upon the 'shaft are two ily wheels 9.`

pump and the plunger 1l of the wet-air pump by the usual connecting rodsand piston rod. These connections are so designed that the` dry-air pumptrunk-piston is at the end of its stroke when the wet-air pump plun'-`ger is approximately at three-quarters of its stroke. In other words,the latter lags behind the former.

lThe wet-air pump is so designed as to have four times the capacitynecessary to discharge the accumulating water.' It therefore resultsthat substantially all the air has been delivered `by the dry-air pumpto the wetair pump before water enters the wet-air pump on the deliveryside of the plunger. But this result will be understood rom thecorrelations of the parts.

The air exhaust pipe 2 leads from the condenser to the dry-air pumpinlet` This inlet is controlled by the usual positively actuated inletvalve 12.. The airl these valves. -A delivery valve deck 17 is locatedat.

the upper end of the wet-air pump5. The valves therein open duringdelivery stroke. An air chamber 18 is locatedupon the upper end of thewet-air pump cylinder 5 and. is of rentrant form, the upper rentrant'vportion formingl guides for the cross-head attached to theplunger rod;A discharge port 19 leads lower part of the air chamber. 7 The pipe 3connects from the lower portion o the condenser to aV box 20 mountedupon the base plate 7. The chamber 21 within the box 20 is divided by apartition 22 forming the deck for the foot valves. The wet-air pump 5 ismounted upon the box 20, and the cylinder is in free communication withthe chamber 21. The dry-air pump cylinder 4 is surrounded by a waterjacket 23 with the usual supply and discharge pipes.I .The jacket opensinto the cylinder space circumferentially at porting 24, which formsacomplete ring, and the water in the jacket comes directly in contactWith the trunk-piston and serves tolubricate and pack the same 'and thusprevent leakage of air.

The operation is as followsz'lower is derived from the steam engine 8,and the wet-air pump 5 and the dry-air -pump 4 are set into operation.Following a cycle of changes,as the trunk-piston 6 of the dry-air pump 4moves up on its suction stroke, the inlet valve yl2 is. positivelyopened by the valve gearing, check valve`14 being -held closed by aspring. Air from the condenser and pipe 2 is therefore drawn into thedry air pump. Before the beginning of the delivery from the stroke, theinlet yalve 12 closes by its own weight.

' opened and the charge forced into said chamber.` The ltion of parts isshown in the drawing.

water is forcedviolently through its valves in the forni ytion 13, Bythe time the plunger 11 is about to unthe up-stroke of the trunk-piston.10. This structure 19 to the hot-well, not shown.

When the pressure in 'the pump exceeds that in the wet-air chamber 25,the check v alves 14 and 15 are plunger 11 uncovers the port 16 at aposition of the trunk-piston of approximately -flg the stroke as shownat the line P on the drawing representing the lower plunger surface, butpressure of the air has not become excessive at this position of thetrunk-piston, as the air has been forced into the space within pipeconneccover inlet port 16, a partial vacuum has been formed l in thechamber 25, so that when the inlet port 16 is uncovered, the compressedair from the dry-air pump opens the check valves 14 and 15, and the airpasses to chamber 25, as just described.

The plunger 11 which lags approximatelyjf stroke with reference to thetrunk-piston 10, will not normally reach thewater in chamber 21, and thecommunicating space in cylinder 5, until stroke, for the reason thatthewet-air pump is designed, as hereinbefore stated, of lfour times thenecessary capacity. This po The plunger 11 is about to allow Water topass through its y'alves, and the admission valve 12 is about to beopened for causes delivery of all' the air for the stroke to the chamber25 of the wet-air pump before water enters, so that the entire-feit'ectv of the suction for the'down-stroke can; be applied'to aid theadmission of air to the chamber 25. It is thus seen that in efect wehave a two-stage air pump, the second stage of which is effected by thewet-air pump, besides serving the function of a wetair pump. Moreo- ,-r,as the plunger 11 descends during approximately the last quarter of itsstroke, the

of spray into the chamber 25 which has already received its full chargeof air from the dry-air pump. 'This water, which is almost whollyvvoidrof air in solution,- will rapidly take up air'in 'chamber 25, andthus become aerated in excellent condition to serve as eedfwater.. Asthis -water is the result of condensa-v tion of steam, it is in a verypure state, and being dcvoid of air', it would seriously affect theboiler by -attacking it chemically and would result in very rapidlypitting the same. By aeratingthis water as stated, theeed water is inbetter condition because' it will not nearly so readily, or in fact notat all, attack the iron oi the boiler. It is of course forced into theair chamber 18 on the up-stroke of the plunger 1l, and from thence isdischarged through the discharge port It is to be noted that the air inchamber 25 is not under much compression until after the inlet port 1Ghas been cut oft. There is therefore not much useless compression of airinto the space between the check valve 15 and the inlet port 16. By thismeans the clearance is reduced to a minimum. Itis also to be thus thewater delivered-is kept free from oil and is v thoroughly charged withair, and these two conditions place it in prime condition for use asboiler feed water,

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention, together with theapparatus which I now consider to represent the best embodiment thereof;but I desire it to be understood that the apparatus shown is merelyillustrative and that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

l1. In a condenser system, a' dry-air pump including a discharge, awet-air pump including; an inlet, and a separate and independent inletto the wet-air pump connecting from the discharge of the dry-air pump.

2. In a condenser system, a dry air pump. a wet air pump having aninlet, and discharge connections from the dry air-pump to'the wet airpump separate from and independent of the inlet to the wet air pump.

3. In a condenser system, a dry-air pump. a wet-air pump, and dischargeconnections from the dry-air pump to the chamber between the valve decksof the wet-nir pump.

4. In a condenser system, a dry-air pump, a wet-nir pump, andconnections between the pumps arranged to discharge from the dry-airpump to the wet-air pump chamber between the discharge valve deck andthe plunger.

5. In a condenser system, a wet air pump, having a water inletconnection to the condenser, a second inlet thereto for air from thecondenser, a check valveA in the second inlet, and means for cutting offthe inlet space between the check valve and the pump.

`6. A wet air pump cylinder having a water inlet eonnecA 'tion tothecondenser, a piston therefor, and a second inlet tothe cylinder for airfrom the condenser, located to be cut 01T by the piston'. 1

7. In a condenser system', a dry-air pump. a wctair pump, meansconnecting the pumps, and a plurality of check valves in the connection.

8. In a condenser system, a dry-air pump, and a wet-air pump, thewet-air pump plunger lagging' behind the dryair pump piston. l

9. In a condenser System, a dry-nir pump, a wet-air pump, and operatingmeans for the pumps constraining

